Bank of Queensland has doubled the size of its latest issue of residential mortgage-backed securities, citing strong investor demand. On Friday, the bank announced that Series 2012-1E REDS Trust had been upsized from the A$500 million offered at its launch earlier in the week to $1 billion.The issue is unusual for including a tranche denominated in British pounds. A number of issuers have sold US dollar tranches this year, but Bank of Queensland said this was the first GBP sale by any Australian RMBS issuer since 2007.BOQ will pay 135 basis points over the one-month bank bill swap rate on the $730 million A1 tranche, which has a weighted average life of 2.9 years.This is a tighter margin than the two RMBS issues priced earlier this month. Pepper priced the Aa tranche of its Prime 2012-1 Trust, which has a weighted average life of 2.2 years, at 145 basis points over swap. People's Choice Credit Union priced the A notes of its Light Trust No. 4, which have a weighted average life of 3.2 years, at 140 basis points over swap.ME Bank and ING Direct, which both issued RMBS in September, priced their top tranches at 135 basis points over the swap rate.BOQ priced the GBP100 million A2S tranche, with a weighted average life of three years, at three-month GBP Libor plus 70 basis points. The rate at which it was swapped back into Australian dollars was not disclosed.Pricing on the $50 million A2A tranche, with a weighted average life of three years, is 135 basis points over the one-month bank bill swap rate.Pricing on the $45.1 million AB tranche, with a weighted average life of 6.1 years, is 290 basis points over swap.Pricing on the $20.1 million B tranche and on the $5 million C tranche was not disclosed.Fitch Ratings has assigned expected ratings of AAA on the top four tranches and an AA rating on the B tranche. The C tranche was not rated.